Package org.apache.sysds.runtime.controlprogram.federated

Class FederatedReadCache

java.lang.Object

org.apache.sysds.runtime.controlprogram.federated.FederatedReadCache

public class FederatedReadCache
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FederatedReadCache.ReadCacheEntry	Class representing an entry of the federated read cache.

Constructor Summary

Constructors

Constructor	Description
FederatedReadCache()

Method Summary

Modifier and Type	Method	Description
CacheableData<?>	get(String fname, boolean putPlaceholder)	Get the data from the ReadCacheEntry corresponding to the specified filename, if the data from this filename has already been read.
void	setData(String fname, CacheableData<?> data)	Set the data for the ReadCacheEntry with specified filename.
void	setInvalid(String fname)	Set the ReadCacheEntry of a given filename to invalid.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FederatedReadCache

public FederatedReadCache()

Method Detail

get

public CacheableData<?> get(String fname,
                            boolean putPlaceholder)

Get the data from the ReadCacheEntry corresponding to the specified filename, if the data from this filename has already been read. Otherwise, create a new ReadCacheEntry for the filename and return null to indicate that the data is not cached yet.

Parameters:

fname - the filename of the read data

putPlaceholder - whether to put a placeholder if there is no mapping for the filename

Returns:

the CacheableData object if it is cached, otherwise null

setData

public void setData(String fname,
                    CacheableData<?> data)

Set the data for the ReadCacheEntry with specified filename.

Parameters:

fname - the filename of the read data

data - the CacheableData object for setting the ReadCacheEntry

setInvalid

public void setInvalid(String fname)

Set the ReadCacheEntry of a given filename to invalid. Usually done after a failing read attempt so that the threads waiting for the data can continue.

Parameters:

fname - the filename of the read data